No phone received since upgrade was done !!!!

I keep having the worst experience with Vodacom. Every time I call to get help I'm promised a call back and no one ever calls. My contact was due for an upgrade- they offered me a phone andI still have not received my phone. This was all done in December. At this moment I'm just fed up!!! Asked them to cancel my contract as a whole a d they telling me big stories- so this nightmare will never end clearly..